HITACHI 173
9.1.4
Register Configuration
Table 9.2 summarizes the DMAC registers. DMAC has a total of 17 registers. Each channel has
four control registers. One other control register is shared by all channels
Table 9.2
DMAC Registers
Chan-
nel
Name
Abbre-
viation
SAR0*
3
DAR0*
3
R/W
Initial
Value
Address
Access
Size
0
DMA source address register 0
R/W
Undefined H'5FFFF40
16, 32
DMA destination address
register 0
R/W
Undefined H'5FFFF44
16, 32
DMA transfer count register 0
TCR0*
3
R/W
R/(W)*
1
Undefined H'5FFFF4A
16, 32
DMA channel control register 0
CHCR0
SAR1*
3
DAR1*
3
H'0000
H'5FFFF4E
8, 16, 32
1
DMA source address register 1
R/W
Undefined H'5FFFF50
16, 32
DMA destination address
register 1
R/W
Undefined H'5FFFF54
16, 32
DMA transfer count register 1
TCR1*
3
R/W
R/(W)*
1
Undefined H'5FFFF5A
16, 32
DMA channel control register 1
CHCR1
SAR2*
3
DAR2*
3
H'0000
H'5FFFF5E
8, 16, 32
2
DMA source address register 2
R/W
Undefined H'5FFFF60
16, 32
DMA destination address
register 2
R/W
Undefined H'5FFFF64
16, 32
DMA transfer count register 2
TCR2*
3
R/W
R/(W)*
1
Undefined H'5FFFF6A
16, 32
DMA channel control register 2
CHCR2
SAR3*
3
DAR3*
3
H'0000
H'5FFFF6E
8, 16, 32
3
DMA source address register 3
R/W
Undefined H'5FFFF70
16, 32
DMA destination address
register 3
R/W
Undefined H'5FFFF74
16, 32
DMA transfer count register 3
TCR3*
3
R/W
R/(W)*
1
Undefined H'5FFFF7A
16, 32
DMA channel control register 3
CHCR3
DMAOR R/(W)*
2
H'0000
H'5FFFF7E
8, 16, 32
Shared
Notes: 1. Write 0 alone in bit 1 of CHCR0–CHCR3 to clear flags.
2. Write 0 alone in bits 1 and 2 of the DMAOR to clear flags.
3. Access SAR0–SAR3, DAR0–DAR3, and TCR0–TCR3 by long word or word. If byte
access is used when writing, the value of the register contents becomes undefined; if
used when reading, the value read is undefined.
DMA operation register
H'0000
H'5FFFF48
8, 16, 32